Question about 2005 Chevrolet TrailBlazer

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Hola..! 2 Problems with this trcuk. #1. I went on a trip this weekend on the way back home my speedometer went crazy registering 110 when I was really going maybe 65 to 70 miles. When I stop the vehicle completely it stays at 30 or 40 Vehicle is a 2005 Chevy Trailblazer. #2. The latch on the back door keeps getting jammed. At times not able to close the back door. Please help I this truck in September I cannot explain why these problems..Chevychica..

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Hola! Cheapest thing to do without replacing the entire cluster gauge assembly is to replace the little stepper motor in the back of the speedometer.

I have not seen problems with the back door "jamming". I have seen problems with the wiring at the top of the door rubbing against metal, shorting out the locking mechanism, which would prevent from locking or would stay locked. Otherwise, could be the locking actuator module going haywire, or it could be relay #8 in the fuse box.

Buenas suerte

Posted on Jan 04, 2011


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